Beginning work on Replay.java

##Changed Files
Replay.java
**NOTE: This test in its current form will take up more than six minutes as it runs through the entire video for both test methods. When AND-13 is resolved, this process will be expedited somewhat.**
* Reordered methods to fit traditional pattern
* renamed firstTimeWatch to setUpReplay as it now includes initializing the second play.
* replaced seekTo utility method with skipAhead utility method, as working with the fast forward button is much easier than working with the seek bar.
  * this may be added to the superclass later, if it is useful for other tests and stable enough
  * for now, the purpose of skipAhead is defeated by the bug currently on Jira under AND-13.
    * skipAhead and setUpReplay have been altered (with the originals in comments) to still function as much as possible without being able to accurately skip through content blocks.
* added javadoc comments